Cooling System Additive

^^Thank you^^ I'm not saying that some of these products will NOT make a difference, good or bad. What I'm saying is "SIGNIFICANT" meaning, if your car runs too hot with water, there is no known coolant additive that will magically get it down to "tolerable."

This is a decent read........

dow.com/heattrans/pdfs/DispellingTheMyths.pdf

The one condition under which antifreeze might be better than water is if it's actually boiling. Boiling water does not efficiently transfer heat that is, the actual transfer. But so far as heat transfer, water is better. Water has a higher specific heat than does most any other coolant I'm aware of. This in essence is the "heat holding" capacity of a substance.